Phenyl-imidazolyl acetic or propionic acid derivatives

ABSTRACT

WHEREIN R4, R5, X, M AND N ARE AS ABOVE DEFINED, WITH AN OPTIONALLY ALKYL-SUBSTITUTED IMIDAZOLE. THESE PHENYL-IMIDAZOLYL-FATTY ACID DERIVATIVES EXHIBIT ANTIMYCOTIC ACTIVITY.   ((R4)N-PHENYL)-C(-OH)(-R5)-(CH2)M-X   WHEREIN R1, R2, AND R3 ARE THE SAME OR DIFFERENT, AND ARE HYDROGEN OR LOWER ALKYL, R4 IS HYDROGEN, ALKYL, LOWER ALKOXY, ALKYLMERCAPTO, OR AN ELECTRO NEGATIVE MOIETY, R5 IS BENZENE, BENZENE SUBSTITUTED BY ALKYL, LOWER ALKOXY, ALKYLMERCAPTO OR AN ELECTRO NEGATIVE MOIETY, OR R5 IS AN ALIPHATIC MOIETY, X IS A CARBOXYL MOIETY OR A GROUPING OF A FUNCTIONAL CARBOXYLIC ACID DERIVATIVE, M IS 0,1,2,3,4,5 OR 6, AND N IS 0, 1 OR 2, AND PHARMACEUTICALLY ACCEPTABLE NON-TOXIC SALTS THEREOF ARE PRODUCED BY REACTING A HALOGEN DERIVATIVE OF THE FORMULA: ((R4)N-PHENYL)-C(-HAL)(-R5)-(CH2)M-X WHEREIN R4,R5,X,M AND N ARE AS ABOVE DEFINED, AND HAL IS HALOGEN, WITH AN OPTIONALLY ALKYL SUBSTITUTED IMIDAZOLE IN THE PRESENCE OF ACID-BINDING BASE OR AN EXCESS OF IMIDAZOLE, PREFERABLY IN AN INERT POLAR SOLVENT AT A TEMPERATURE OF FROM ABOUT 20*C. TO ABOUT 180*C., OR REACTING THE ABOVE HALOGEN DERIVATIVE WITH AN ALKALI METAL OR SILVER SALT OF AN OPTIONALLY ALKYL SUBSTITUTED IMIDAZOLE IN AN INERT SOLVENT AT A TEMPERATURE OF FROM ABOUT 20*C. TO ABOUT 200*C., OR REACTING A HYDROXY COMPOUND OF THE FORMULA:   1-((R4)N-C6H4-C(-R5)(-(CH2)M-X)-),2-R2,4-R3,5-R1-   PHENYL-IMIDAZOLYL-FATTY ACID DERIVATIVES OF THE FORMULA:

United States Patent 3,732,242 PHENYL-IMIDAZOLYL ACE'I'IC 0R PROPIONIC ACID DERIVATIVES Karl Heinz Buche], Werner Meiser, Manfred Plempel,

and Carl Metzger, Wuppertal-Elberfeld, Germany, assignors to Farbenfabriken Bayer Aktiengesellschaft, Leverkusen, Germany No Drawing. Filed May 18, 1970, Ser. No. 38,531 Claims priority, application Germany, May 21, 1969,

P 19 25 994.0 Int. Cl. C0711 49/00 US. Cl. 260-309 41 Claims ABSTRACT OF THE DISCLOSURE Phenyl-imidazolyl-fatty acid derivatives of the formula:

R -0-N R -R 1? (M and R R and R are the same or different, and are hydrogen or lower alkyl;

R is hydrogen, alkyl, lower alkoxy, alkylmercapto, or

an electro negative moiety;

R is benzene, benzene substituted by alkyl, lower alkoXy, alkylmercapto or an electro negative moiety, or R is an aliphatic moiety;

X is a carboxyl moiety or a grouping of a functional carboxylic acid derivative;

mis0,l,2,3,4,5or6;and

n is 0, 1 or 2,

wherein and pharmaceutically acceptable non-toxic salts thereof are produced by reacting a halogen derivative of the formula:

wherein R R X, m and n are as above defined, and Hal is halogen,

with an optionally alkyl substituted imidazole in the presence of acid-binding base or an excess of imidazole, preferably in an inert polar solvent at a temperature of from about 20 C. to about 180 C., or reacting the above halogen derivative with an alkali metal or silver salt of an optionally alkyl substituted imidazole in an inert solvent at a temperature of from about 20 C. to about 200 C., or reacting a hydroxy compound of the formula:

wherein R R X, m and n are as above defined,

with an optionally alkyl-substituted imidazole.

These phenyl-imidazolyl-fatty acid derivatives exhibit antimycotic activity.

The present invention is concerned with phenyl-imidazolyl-fatty acid derivatives, salts thereof, and processes for their production. More particularly, the compounds of the present invention are phenyl-imidazolyl-fatty acid derivatives of the formula:

3,732,242 Patented May 8, 1973 and pharmaceutically acceptable non-toxic salts thereof. These compounds are particularly useful for their antimycotic activity.

When any of the moieties R R or R are alkyl, it is preferred that they contain 1 to 4 carbon atoms.

When 'R is an alkyl moiety, it is preferred that it contain 1 to 4 carbon atoms, and methyl is particularly preferred. It is also preferred that the lower alkoxy moieties and the lower alkylmercapto moieties contain 1 to 4 carbon atoms in the alkyl portion of the moieties. The term alkyl and lower alkyl as used herein is intended to embrace the straight as well as the branched chain alkyl moieties. R includes, in addition to the alkyl moieties, the alkenyl and the alkynyl moieties as well.

Preferred electro negative substituents for R are halogen, fluorine, chlorine, bromine or iodine, chlorine being particularly preferred, N0 trifluoromethyl and cyano, as well as SO-alkyl and SO -alkyl in which the alkyl moieties contain from 1 to 6 carbon atoms and preferably from 1 to 4 carbon atoms. As above indicated, these alkyl moieties may be straight or branched-chain.

When R in an aliphatic moiety, this can be straight or branched chain, saturated alkyl of 1 to 8 carbon atoms and preferably of 1 to 4 carbon atoms. The aliphatic moiety may also be a saturated or unsaturated cycloaliphatic moiety of 3 to 6 carbon atoms and preferably of 5 to 6 carbon atoms in the ring system.

Examples of functional carboxylic acid derivatives for X include esters, carboxamide and nitrile groups.

If X is an ester moiety, its alcohol portion is a substituted, straight or branched chain, saturated or un saturated aliphatic, cycloaliphatic or heteroaliphatic moiety. If this alcohol portion contains an alkyl group, this alkyl group is straight or branched chain of l to 18 carbon atoms and preferably of 1 to 12 carbon atoms, or such alkyl group substituted by an aromatic moiety.

If X is a carboxamide moiety, it is a free carboxamide moiety, a monoalkyl-carboxamide moiety or a dialkylcarboxamide moiety wherein the alkyl portions are lower alkyl moieties, or lower alkyl moieties which may be linked to form a 5-, 6- or 7-membered ring system, or a 6-membered ring system having an oxygen, sulphur or nitrogen atom, or a 6-membered ring having an oxygen, sulphur or nitrogen atom which has attached thereto a lower alkyl moiety of 1 to 4 carbon atoms which is preferably in the p-position.

The salts of the present invention are physiologically compatible salts since the compounds of the present invention are intended for ministration to humans and animals. Thus, the salts may be formed with any of the known physiologically compatible acids, such as the hydrohalic acids, phosphoric acids, monoand bifunctional carboxylic acids, hydroxycarboxylic acids, for example acetic acid, maleic acid, succinic acid, fumaric acid, tartaric acid, citric acid, salicyclic acid, sorbic, lactic acid and 1,5-naphthalene-disulphonic acid.

The phenyl-imidazolyl-fatty acid derivatives of the present invention are produced by:

(a) Reacting a halogen derivative of the formula:

wherein R R m, and n are as above defined, and Hal is halogen, preferably chlorine,

with an imidazole or an alkyl-substituted imidazole in the presence of an acid-binding base or an excess of imidazole, expediently in an inert polar solvent, such as acetonitrile, toluene, xylene, chlorobenzene, cyclohexane, acetone, diethyl ketone, dimethyl formamide or dimethyl sulphoxide, at a temperature of from about 20 C. to about 180 C., and especially of from about 50 C. to about 100 C.;

(b) Reacting a halogen derivative of the formula:

R R X, m and n are as above defined, and Hal is halogen, preferably chlorine,

with an alkali metal or silver salt of imidazole or of an alkyl-substituted imidazole in an inert solvent, such as benzene, toluene, xylene or cyclohexane at a temperature of from about 20 C. to about 200 C., and preferably a hydroxy compound of the formula:

() Reacting a hydroxy compound of the formula:

wherein R R X, m and n are as above defined with imidazole or an alkyl-substituted imidazole, with the elimination of water.

These reactions can be carried out according to procedures which are per se known, for example they may be carried out in the melt or with the aid of the azeotropic elimination of water in the presence of higherboiling solvents, such as xylene, chlorobenzene, etc., at the boiling point of the solvent used. In addition, it may be expedient at times to facilitate the elimination of water by the addition of a suitable dehydrating agent, such as alkaline earth metal oxide, for example MgO, BaO, CaO, or A1 0 The pharmaceutically acceptable non-toxic salts of the phenyl-imidazolyl-fatty acid derivatives are, of course, obtained by reacting the free base with the corresponding acid.

According to the present invention, a preferred group of compounds is represented by the formula:

wherein R and R are both hydrogen;

R is hydrogen or methyl;

R is hydrogen, methyl, methoxy, nitro, fluorine, chlorine,

or bromine;

R is phenyl, phenyl-substituted in the p-position by fluo- 4 rine, chlorine, bromine, methyl, methoxy or nitro, or R is a straight or branched chain alkyl moiety of 1 to 5 carbon atoms; X is a carboxyl group, a moiety of the formula:

wherein R is straight or branched chain alkyl of 1 to 10 carbon atoms or benzyl, a moiety of the formula:

II -oN wherein R and R are the same or diiferent, and are hydrogen or methyl, or R and R together with the amide nitrogen form a morpholino or piperidino ring, or X is a cyano moiety;

m is 0,1, 2, 3, 4, 5 or 6; and

n is 1.

Table I below lists representative phenyl-imidazolylfatty acid derivatives of the present invention.

TABLE I (1) diphenyl-imidazolyl-acetic acid methyl ester (2) diphenyl-imidazolyl-acetic acid (3) diphenyl-imidazolyl-acetic acid ethyl ester (4) diphenyl-imidazolyl-acetic acid n-propyl ester (5 diphenyl-imidazolyl-acetic acid isobuytl ester (6) diphenyl-imidazolyl-acetic acid n-octyl ester (7) diphenyl-imidazolyl-acetic acid n-decyl ester (8) diphenyl-imidazolyl-acetic acid benzyl ester (9) diphenyl-imidazolyl-acetic acid nitrile (10) phenyl-4-methylphenyl-imidazolyl-acetic acid methyl ester (11) phenyl-Z-methylphenyl-imidazolyl-acetic acid methyl ester (12) fl-imidazolyl-Bfi-diphenyl propionic acid ethyl ester (13) hydrochloride of diphenyl-imidazolyl acetic acid methyl ester (14) pheny1-4-chlorophenyl-imidazolyl-acetic acid ethyl ester (15) phenyl-4-chlorophenyl-imidazolyl-acetic acid methyl ester (16) phenyl-2-chlorophenyl-imidazolyl-acetic acid methyl ester l7) phenyl-isopropyl-imidazolyl-acetic acid ethyl ester (18) diphenyl-imidazolyl-acetic acid amide (19) diphenyl-imidazolyl-acetic acid methylamide (20) diphenyl-imidazolyl-acetic acid dimethylamide (21) diphenyl-imidazolyl-acetic acid morpholide (22) diphenyl-imidazolyl-acetic acid piperidide (23) bis-(4-chlorophenyl)-imidazolyl-acetic acid methyl ester (24) bis-(4-tolyl)-imidazolyl-acetic acid methyl ester.

(25) bis-(4-bromophenyl)-imidaZolyl-acetic acid methyl ester (26) bis-(4-fluorophenyl)-imidazolyl-acetic acid methyl ester and the hydrochloride salt thereof (27) bis-(4-methoxy-phenyl)imidazolyl-acetic acid methyl ester (28) bis-(4-nitro-phenyl)-imidazolyl-acetic acid ethyl ester hydrochloride (29) phenyl-isopropyl-imidazolyl-propionic acid ethyl ester (30) phenyl-isopentyl-imidazolyl-propionic acid ethyl ester (31) phenyl-ethyl-imidazolyl-isobutyric acid methyl ester (32) dipheny-l-Z-methyl-imidazolyl-acetic acid methyl ester (33) phenyl-tert.-butyl imidazolyl acetic acid methyl ester (34) diphenyl-imidazolyl-acetic acid methyl estertartrate (35) diphenyl-imidazolyl-acetic acid methyl ester-succinate (36) diphenyl-irnidazolyl-acetic acid methyl ester-methanesulphonate (37) diphenyl-imidazolyl-acetic acid methyl ester-methane sulphonate (38) diphenyl-irnidazolyl-acetic acid methyl ester-naphthalene-1,5-disulphonate.

Particularly preferred compounds according to the present invention are diphenyl-imidazolyl-acetic acid methyl ester and the hydrochloride salt thereof.

The starting materials required for the preparation of compounds of the present invention are per se known or are obtainable according to processes which themselves are known per se.

The following non-limitative examples more particularly point out and illustrate the present invention.

Example 1 [TI \NJ Q-(il-COOCHB 13 g. (0.05 mole) diphenyl-chloroacetic acid methyl ester (B.P. 140 C./0.1 mm. Hg, prepared from diphenylchloroacetic acid chloride and methanol according to Ber. 22, 1537) are heated with g. imidazole in 100 m1. acetonitrile at boiling temperature for 18 hours. After distilling off the solvent in a vacuum, 50 ml. of water are added and the mixture is extracted with methylene chloride. After drying over sodium sulphate, the solvent is distilled ofl in a vacuum and the residue recrystallized from a little ethyl acetate. The diphenyl-imidazolyl-acetic acid methyl ester is thus obtained in the form of colourless crystals of M.P. 155 C. (with decomposition).

Example 2 The corresponding carboxylic acid i.e. diphenyl-imidazolylacetic acid is obtained by hydrolysis of the diphenyl-imidazolylacetic acid methyl ester obtained in Example 1, with an alcoholic potassium hydroxide solution.

Examples 3-8 The compounds of these examples were obtained according to the procedure set forth in Example 1, by reacting imidazole with the following reactants:

From 13.7 g. diphenyl-chloroacetic acid ethyl ester (0.05 mole) (Ber. 22, 1537): the diphenyl-imidazolylacetic acid ethyl ester of M.P. 104 C.

From 14.4 g. diphenyl-chloroacetic acid propyl ester (B.P. 155 C./0.3 mm. Hg): the diphenyl-imidazolylacetic acid n-propyl ester of M.P. 71 C.

From 15.1 g. diphenyl-chloroacetic acid isobutyl ester (B.P. 150 C./0.2 mm. Hg): the diphenyl-imidazolylacetic acid isobutyl ester as oil.

From 16.0 g. diphenyl-chloroacetic acid octyl ester (B.P. 195 C./0.3 mm. Hg): the diphenyl-imidazolylacetic acid n-ocytl este'r as oil.

From 19.3 g. diphenyl-chloroacetic acid decyl ester: the diphenyl-imidazolyl-aoetic acid n-decyl ester of M.P. 48 C.

From 16.8 g. diphenyl-chloroacetic acid benzyl ester: the diphenyl-imidazolyl-acetic acid benzyl ester as oil.

Example 9 1.1 Q-t 5.9 g. diphenyl-chloro-acetonitrile (prepared from diphenylchloroacetamide, Ber. 41, 3593 by heating in phosphorus oxy-chloride; B.P. C./ 0.4 mm. Hg) are heated with 5 g. imidazole in 50 ml. acetonitrile at boiling temperature for 18 hours. After treating with 20 ml. of water, the mixture is extracted with methylene chloride. The solvent is distilled off after drying in a vacuum. The solid residue is recrystallized from ethyl acetate/petroleum ether. Diphenyl-imidazolyl-acetonitrile i.e. diphenylimidazolyl-acetic acid nitride of M.P. 98 C. is thus obtained.

Example 10 13.7 g. phenyl-p-tolyl-chloroacetic acid methyl ester (prepared from p-tolyl-magnesium bromide and benzoylformic acid methyl ester and treatment with P01 (B.P. C./0.3 mm. Hg) are heated with 10 g. imidazole in 100 ml. acetonitrile at boiling temperature for 16 hours. The acetonitrile is distilled off in a vacuum. The residue is treated with 50 ml. of water and then extracted with methylene chloride. The methylene chloride solution is distilled ofi in a vacuum and the residue recrystallized from a little ethyl acetate. The phenyl-p-tolylimidazolyl-acetic acid methyl ester i.e. phenyl-4-methylphenylimidazolyl-acetic acid methyl ester of M.P. 146 C. is thus obtained.

Example 11 The phenyl-o-tolyl-imidazolyl-acetic acid methyl ester i.e. phenyl-2-methylphenyl-imidazolyl-acetic acid methyl ester (M.P. 148 C.) is obtained in an analogous way from phenyl-o-tolyl-chloroacetic acid methyl ester (B.P. C./0.4 mm. Hg).

Example 12 14.4 g. (0.05 mole fi-chloro-flfi-diphenyl-propionic) acid ethyl ester (prepared from fi-hydroxy-B,,B-diphenylpropionic acid ethyl ester, Ber. 40, 4538, by treatment with phosphorus pentachloride) are heated in 100 ml. acetonitrile with 10 g. imidazole at boiling temperature for 16 hours. The solvent is distilled ofi in a vacuum, the residue treated with 50 ml. of water and extracted with methylene chloride. After drying, the solvent is distilled off in a vacuum. The fi-imidazolyl-fl,fi-diphenyL propionic acid ethyl ester is thus obtained in the form of crystals of M.P. 75 C.

Example 13 5 g. of the diphenyl-imidazolyl-acetic acid methyl ester of Example 1 are dissolved in carbon tetrachloride and hydrogen chloride is introduced with cooling. The carbon tetrachloride is decanted oil from the precipitated oily salt and the salt is reprecipitated from acetone/ ether. The hydrochloride of the above base i.e. diphenyl-imidazolyl-acetic acid methyl ester hydrochloride is thus obtained; M.P. 131 C. (decomp).

Example 14 15.45 g. (0.05 mole) phenyl-p-chlorophenyl-chloroacetic acid ethyl ester (prepared from p-chlorophenyl-magnesium bromide and benzoyl-formic acid ethyl ester and subsequent treatment with thionyl chloride: B.P. 160 C./0.2 mm. Hg) are boiled with 10 g. imidazole in 100 ml. acetonitrile for 16 hours. After distilling 01f the solvent, 50 ml. of Water are added, and the mixture is extracted with methylene chloride. After drying, the solvent is distilled off in a vacuum and the phenyl-p-chlorophenyl-imidazolyl acetate acid ethyl ester i.e. phenyl-4- chlorophenyl-imidazolyl-acetic acid ethyl ester is obtained in the form of an oil which solidifies after a fairly long time.

Example 15 The phenyl-p-chlorophenyl imidazolyl acetic acid methyl ester i.e. phenyl-4-chlorophenyl-imidazolyl-acetic acid methyl ester of melting point 135 C. (ethyl acetate) is obtained in an analogous way by reacting phenyl-p-chlorophenyl-chloroacetic acid methyl ester and imidazolc.

Example 16 The phenyl-o chlorophenyl imidazolyl acetic acid methyl ester i.e. phenyl 2 chlorophenyl-imidazolylacetic acid methyl ester of melting point 138 C. (ethyl acetate) is obtained by the method described in Example 14 by reacting phenyl-o-chlorophenyl-chloroacetic acid methyl ester and imidazole.

Example 17 12 g. (0.05 mole) phenyl-isopropyl-chloroacetic acid ethyl ester (B.P. 95 C./0.3 mm. Hg) are heated with g. imidazole and 100 ml. acetonitrile at boiling temperature for 18 hours. After distilling off the solvent in a vacuum, 50 ml. of Water are added and the mixture is extracted by shaking with methylene chloride. The methylene chloride is dried and distilled off in a vacuum. The phenyl-isopropyl-imidazolyl-acetic acid ethyl ester is thus obtained in the form of an oil.

Example 18 12.27 g. (0.05 mole) diphenyl-chloroacetic acid amide (Ber. 41, 3593) are heated with 11.8 g. imidazole in 100 ml. acetonitrile at boiling temperature for 18 hours. After cooling, the crystals are suspended in water and rinsed. After recrystallization from methanol, diphenyl-imidazolyl-acetic acid amide of M.P. 218 C. is obtained.

Example 19 18.1 g. diphenyl-chloroacetic acid dimethylamide (M.P. 128 0, prepared by analogy with Example 19) are heated with 15.6 g. imidazole in 120 ml. acetonitrile at boiling temperature for 18 hours. The solvent is distilled off in a vacuum. After the addition of 70 ml. of water, the mixture is extracted with methylene chloride. After drying, the solvent is distilled off in a vacuum and the solid residue is recrystallized from methanol. The diphenyl-imidazolyl-acetic acid dirnethyl amide of M.P. 202 C. is thus obtained in the form of colourless crystals.

Example 21 The diphenyl-imidazolyl-acetic acid morpholide is obtained from 15.5 g. diphenyl-chloroacetic acid morpholide (M.P. 113 C.) and 11 g. imidazole in 100 ml. acetonitrile on analogy with Example 20.

The hydrochloride of diphenyl-imidazolyl-acetic acid morpholide of M.P. 118 C. is obtained by adding ethereal hydrochloric acid to a solution of diphenyl-imidazolylacetic acid morpholide in ethyl acetate.

Example 22 The diphenyl-imidazolyl-acetic acid piperidide of M.P. 160 C. is obtained from 15.4 g. diphenyl-chlor-acetic 8 acid piperidide (M.P. 82 C.) and 10 g. imidazole in 100 ml. acetonitrile in analogy with Example 20.

Example 23 162.6 g. (0.434 mole) of 4,4-dichlorodiphenylbromoacetic acid methyl ester (prepared from 4,4 dichlorobenzilic acid methyl ester) and phosphorus pentabromide (B.P. 190/0.5 mm. Hg) are heated to the boil for 14 hours, with stirring, with g. (1.32 moles) of imidazole in 1 litre of acetonitrile. The acetonitrile is distilled off in a vacuum. For the removal of imidazole, the residue is twice shaken with, in each case, 1.3 litres of water, then taken up in 950 ml. of methylene chloride and again extracted with 1.8 litres of water. After drying with sodium sulphate, the methylene chloride is distilled in a vacuum. The residue is boiled out four times with, in each case, 250 ml. of ether; the ethereal solution, after clarification With charcoal, is precipitated with ethereal hydrochloric acid. The precipitate is digested with absolute ether and taken up in methylene chloride; after filtration, ethyl acetate is added. When the methylene chloride is evaporated on a water-bath, the hydrochloride of bis-(4-chlorophenyl)-imidazolyl-acetic acid methyl ester of the melting point 150 C. (with decomposition) crystallizes out in colourless crystals.

When the hydrochloride is shaken with methylene chloride and solution of sodium carbonate, a solution of the base is obtained. After this has been dried, distillation in a vacuum is effected and the residue is recrystallized from dry ether. There are so obtained the colourless crystals 0f bis-(4-chlorophenyl)-imidazolyl-acetic acid methyl ester of the melting point 132 C.

Example 24 Analogously with Example 23, there is obtained from 13.3 g. 4,4-ditolyl-a-bromoacetic acid methyl ester and 10 g. imidazole in ml. acetonitrile the hydrochloride of bis-(4-tolyl)-imidazolyl-acetic acid methyl ester of the melting point 140 C. (with decomposition) in colourless crystals.

Example 25 19.4 g. 4,4-dibromodiphenylbromoacetic acid methyl ester (prepared from 4,4'-dibromodiphenylacetic acid methyl ester and bromosuccinimide) are heated to the boil for 15 hours with 8.4 g. imidazole in 8.5 ml. acetonitrile. The acetonitrile is distilled off in a vacuum. The residue is shaken twice with, in each instance, ml. of Water and decanted. The residue is then taken up in about 100 ml. of methylene chloride and again extracted with 80 ml. of water. After drying of the methylene chloride, the later is distilled off in a vacuum. The residue is boiled out four times with, in each case, 100 ml. of absolute ether. The ether is clarified with charcoal and precipitation is effected with ethereal hydrochloric acid. The hydrochloride precipitating in lumps is digested twice with absolute ether, then taken up in methylene chloride. After filtration, ethyl acetate is added, and the methylene chloride is evaporated on a Water-bath. After cooling, the hydrochloride of his (4-bromophenyl)-imidazolyl-acetic acid methyl ester of the melting point 140 C. crystallizes out in colourless crystals.

The hydrochloride is shaken with methylene chloride and solution of sodium carbonate. The solution of the base in methylene chloride is dried and distilled off in a vacuum. The residue is recrystallized from a little absolute ether. There are so obtained the colourless crystals of bis- (4-bromophenyl)-imidazolyl-acetic acid methyl ester of the melting point C.

Example 26 In the same manner as in Example 23, there is obtained from 40.1 g. 4,4'-difluorodiphenylbromoacetic acid methyl ester (B.P. 143/0.4 mm. Hg, prepared from 4,4'-difluorodiphenylacetic acid methyl ester and N-bromosuccinimide) and 23.6 g. imidazole in 236 ml. acetonitrile the hydrochloride of bis- (4-fiuorophenyl)-imidazolylacetic acid methyl ester of the melting point 147 C. From this there is obtained, with solution of sodium carbonate in methylene chloride, the free base of the melting point 128 C.

Example 27 In the same manner as in Example 23, there is obtained from 4,4'-dimethoxybenzylic acid methyl ester (M.P. 110 C.) with phosphorus pentachloride via 4,4-dimethoxyphenyl-a-chloroacetic acid methyl ester with imidazole in acetonitrile the bis-(4-methoxyphenyl)-imidazolyl-acetic acid methyl ester of the melting point 13 1 C.

Example 28 In the same manner as in Example 23, with analogous working up, there is obtained from 10.25 g. 4,4-dinitrodiphenylbromoacetic acid ethyl ester (M.P. 130 C., prepared from 4,4-dinitrodiphenylacetic acid ethyl ester and N-bromosucinimide) and 'g. imidazole in 70 ml. acetonitrile the hydrochloride of bis-(4-nitrophenyl)imidazolylacetic acid ethyl ester of the melting point 130 C. (with decomposition) in colourless crystals.

' Example 29 Analogously with Example 12, by reacting fl-chloro-B- phenyl-fi-isopropyl-propionic acid ethyl ester and imidazole, l9-phenyl-fl-isopropyl-B-imidazolyl-propionic acid ethyl ester is obtained as oil, and from this there is obtained, with ethereal hydrochloric acid, the hydrochloride of the melting point 194 C.

Example 30 Analogously with Example 12, by reacting fi-chloro-,3 phenyl-B-isopentyl-propionic acid ethyl ester and imidazole, fl-phenyl-fl-isopentyl-fi-imidazolyl-propionic acid ethyl ester is obtained as oil.

Example 31 Analogously with Example 12, by reacting fl-chloro-pphenyl-fl-ethyl-isobutyric acid ethyl ester and imidazole, fl-phenyl-B-ethyl-fi-imidazolyl-isobutyric acid ethyl ester is obtained as oil.

Example 32 13 g. diphenyl-u-chloroacetic acid methyl ester (0.05 mole) are heated to the boil for hours with 12.1 g. 2- rnethyl-imidazole in 100 ml. acetonitrile. The acetonitrile is distilled 01f in a vacuum. 200 ml. of water are added to the residue, which is then taken up in 200 ml. methylene chloride. The methylene chloride is extracted twice with, in each case, 150 ml. of water, dried and distilled 01f in 10 a vacuum. The residue is recrystallized from a little ethyl acetate. There is so obtained the diphenyl-Z-methyl-imidazolyl-acetic acid methyl ester of the melting point 136 C.

Example 33 12.7 g. (0.05 mole) phenyl-tert.-butyl-chloroacetic acid methyl ester (B.P. 96 C./0.3 mm. Hg) are heated to the boil for 17 hours with 10 g. imidazole and 100 ml. acetonitrile. After the solvent has been distilled off in a vacuum, treatment with 70 ml. of water is effected followed by extraction with methylene chloride. The methylene chloride is again extracted with 30 ml. of water, dried and distilled oflf in a vacuum. There is so obtained the phenyltert.-butyl-imidazolyl-acetic acid methyl ester as oil, which solidifies after a long time.

Example 34 From the diphenyl-imidazolyl-acetic acid methyl ester obtainable according to Example 1 and the appropriate acid listed, the following salts of diphenyl-imidazolylacetic acid methyl ester are obtained:

Melting poin t Acid Salt C.

'Iartarrc. Tartrate 1 Succinlc- Succinate 1 107 Sulphuric Sulphate 1 Methane-sulphonic Methane-sulphonate 154 Naphthalened, 5- Naphthalene-1, 5- 1 229 disnlphonic. disulphonate.

1 Decomposition.

(a) in the case of dermatophytes and mould fungi, in

Sabourauds milieu-depreuve, (b) in the case of yeasts, in yeast/meat broth bouillon.

The incubation temperature was 28 C. and the duration of incubation was 48 to 96 hours.

TABLE II Minimum inhibition concentration in /1111. test medium in the case of Trichophyton ment. Candida albicans Aspergillus niger Compound from Without With Without With Pen. Without With Mz crosp. example serum serum serum serum comune serum serum felmeum TABLE III [Minimum inhibition concentration in 7/1111. nutrient medium] Trichophyton men/tagrophutes Candida albicans Aspergillus niger serum serum Penicilserum Micro- Hysto- Caccl- Compound from lium aporon plasma diodes example With Without With Without comune With Without felineum capsulaimmitia tum 4 20 1 1 1 1 1 4 2L- 40 40 100 100 100 Hydrochloride: 23.- 4 4 100 10 10 100 Base: 23 4 10 10 20 4 100 Hydrochloride: 4 4 10 100 100 Base 25 4 100 4 40 40 100 The following compounds representative of those of the present invention were tested for in-vivo activity according to the procedures set forth below:

diphenyl-imidazolyl-acetic acid methyl ester-(Example 1) diphenyl-imidazolyl-acetic acid ethyl ester-(Example 3) diphenyl-imidazolyl-acetic acid n-propyl ester-(Example 4) diphenyl-imidazolyl-acetic acid iso-butyl ester-(Example 5) phenyl-Z-methylphenyl-imidazolyl-acetic acid methyl ester-(Example 11) diphenyl-imidazolyl-acetic acid methyl ester hydrochloride-(Example 13) diphenyl-imidazolyl-acetic acid morpholide hydrochloride(Example 21) bis-(4-chlorophenyl)-imidazolyl-acetic acid methyl ester-(Example 23) bis-(4-chlorophenyl)imidazolyl-acetic acid methyl ester hydrochloride-(Example 23) bis-(4-bromophenyl)-imidazolyl-acetic acid methyl ester (base)-(Example 25) bis-(4-bromophenyl)imidazolyl-acetic acid methyl ester hydrochloride(Example 25 bis- (4-fluorophenyl-imidazolyl-acetic acid methyl ester hydrochloride(Example 26) bis-(4-methoxyphenyl)-imidazolyl-acetic acid methyl ester (-base)(Example 27) bis- (4-4-nitrophenyl)-imidazolyl-acetic acid ethyl ester hydrochloride-(Example 28) (A) Oral treatment of experimental cadidiasis of the White mouse with the compounds of Examples 1, 3, 4, 5,11,13, 21, 23, 25, 26, 27 and 28.

do mice of the strain CF -SPF of 20-22 g. weight were infected intraveneously with 2-5 "10 Candida albicans cells per mouse. With this experimental arrangement, untreated animals died of the infection within 6 days.

When 30-60 mg. of these compounds per kilogram body weight of the infected animals was administered orally once or twice daily, an average of 13 to 16 of the 20 animals receiving the administration survived on the 6th day after infection. In the case of treatment with the compound of 'Examples 13, 19 to 20 of the animals of the group of 20 survived. The optimum dosage for the compounds of Examples 1, 3, 5, 13, 23 and 28 was shown to be mg./kg. twice daily. The optimum dosage for compounds of Examples 4, ll, 21, 25, 26 and 27 was shown to be mg./kg. twice daily.

For oral application, the preparations were suspended in 0.25%-strength glucose-agar and administered with the oesophageal sound.

(B) Parenteral treatment of experimental candidiasis and histoplasmosis of the mouse with the compound from Example 13.

In the case of a parenteral administration of the compound from Example 13 in a dosage of 25 mg./kg. twice daily, 18 of 20 animals survived 6 days after the infection.

(C) Local treatment of experimental guinea-pig trichophytosis with the compound from Example 13.

Infection of the animals was effected by Trichophyton mentagrophytes. From the 3rd day after infection, the infection point was treated once daily by application of 0.5 ml. of a 1%-strength solution of the active compound in polyethyleneglycol 400. This treatment was continued up to the 14th day after infection. Within the therapy period, the dermatosis healed up. In the case of untreated infected control animals, bleeding ulcerations of the infection point as well as loss of hair occured up to about 30 days after infection.

The phenyl-imidazolyl-fatty acid derivatives and the pharmaceutically acceptable non-toxic salts thereof are thus particularly useful in treating the following diseases:

(a) In human medicine:

(1) Dermatocycoses caused by fungi of the species Trichophytes, Microsporium, Epidermophytes, Aspergillus, Candida albicans and other yeasts,

(2) Organomycoses caused by yeasts, mould fungi and Dermatophytes,

(b) In veterinary medicine:

Dermatomycoses and organomycoses by yeasts, mould fungi and Dermatophytes.

The compounds of the present invention may be administered orally, parenterally or topically.

While in general it has proved advantageous to administer from about 20 mg./kg. to about 50 mg./kg. per day in order to achieve satisfactory results, it is to be appreciated that it may be necessary to deviate from these ranges and that a variety of factors such as the body weight of the test animal or patient, the method of administration, the anirnal species, the past medical history of the patient, the individual reaction to the medicaton, the type of formulation, and the moment in time or the time interval at which it is to be administered are all among the factors which are to be taken into consideration. It may in certain cases be sufiicient to use less than the above indicated minimum amount, whereas in other cases it may be necessary to administer more than the above indicated amount. If larger amounts are to be administered, it is preferred that these be administered in several dosages during the course of the day.

Also according to the present invention are pharmaceutical compositions which comprise the phenyl-imidazolyl-fatty acid derivatives or the pharmaceutically acceptable non-toxic salts thereof in combination with pharmaceutically acceptable non-toxic carriers and diluents. Suitable forms of application, in combination with various inert carriers, are the following: tablets, capsules, powders, sprays, aqueous suspensions, injectable solutions, elixirs, syrups and the like. Such carriers comprise solid diluents or fillers, a sterile aqueous medium as well as non-toxic organic solvents and the like. Tablets and the like intended for oral application may, of course, be provided with sweetening additives and similar substances. In the aforesaid case the therapeutically active compound should be present at a concentration of about 0.5 to 90 percent by weight of the total mixture, i.e. in quantities which are suflicient to achieve the range of dosage mentioned above.

The pharmaceutical compositions according to the present invention may include a protective envelope containing the active compound and if the compound is in combination with a diluent or carrier, the envelope may contain said diluent or carrier as well.

The term medicament in dosage unit form as used in the present specification means a medicament as defined above in the form of discrete portions each containing a unit dose, or a multiple or sub-multiple of a unit dose of the active compound or compounds. Such portions may, for example, be in monolithic coherent form, such as tablets, suppositories, pills or dragees; in wrapped or concealed form, such as wrapped powders, cachets, sachets, or capsules; in ampoules, either free or as a sterile solution suitable for parenteral injection; or in any other form known to the art.

In the case of oral application, the tablets can obviously also contain additives, such as sodium citrate, calcium carbonate and dicalcium phosphate together with various other additives such as starch, preferably potato starch, and the like, and binding agents, such as polyvinyl-pyrrolidone, gelatin and the like. Lubricants, such as magnesium stearate, sodium lauryl sulphate and talc may also be added for the production of tablets. In the case of aqueous suspensions and/or elixirs which are intended for oral application, the active substances may be used with various flavouring agents, colouring substances, emulsifiers and/ or together with diluents, such as water, ethanol, propylene glycol, glycerol and similar compounds or combinations of this type.

In the case of parenteral application, solutions of the active substances in sesame or peanut oil, or in aqueous propylene glycol or N,N-dimethyl formamide can be used as can sterile aqueous solutions in the case of watersoluble compounds. Aqueous solutions of this kind should be buffered in usual manner if necessary; furthermore, the liquid diluent should previously be rendered isotonic by the addition of the necessary amount of salt or glucose. Such aqueous solutions are particularly suitable for intravenous, intramuscular, intraperitoneal and subcutaneous injections. Sterile aqueous media of this kind are prepared in known manner.

Local application is effected in the form of 0.5-%, preferably 1%, solutions (for example in dimethyl formamide, glycerol, water; alcohol, such as ethanol and isopropanol and buffer solutions), but also as emulsions, suspensions, powders and tablets.

When the compounds of the present invention are administered, they may of course be administered either in the form of a free base or in the form of a pharmaceutically acceptable nontoxic salt thereof. Thus, the free base and the salts may be contained in capsules, tablets, pastilles, drages and ampoules, and the like for oral administration which is a particularly facile mode of administration.

The phenyl-imidazolyl-fatty acid derivatives and the pharmaceutically acceptable non-toxic salts thereof, or the pharmaceutical compositions above described may be formulated in unit dosage form wherein each dosage unit is so formulated that it provides a single dose of the 14 active compound, or it may contain a plurality of doses, or a fraction of a dose. Common dosages include two, three or four doses or a half, quarter or third of a dose.

While hitherto known antimycotics are effective only against yeasts, such as amphotericin B, or only against zygomycetes, such as griseofulvin, the compounds of the present invention even upon oral administration are effective against yeast as well as zygomycetes. In particular, the compounds of the present invention exhibit substantially less toxicity than amphotericin B and their effectiveness is substantially greater than that of griseofulvin.

In addition to their antimycotic activity, the compounds of the present invention also exhibit activity against pathogenic protozoa, such as trypanosomes, trichomonades, Entamoeba histolytica, causative organisms of malaria, as well as an activity against gram-positive cocci, such as staphylococci, and against gram-negative bacteria, such as E. coli. When the compounds of the present invention are administered to humans or animals for such activity, they are administered in the same general manner and amounts as known compounds exhibiting those activities.

What is claimed is:

1. A compound according to claim 37 wherein R is hydrogen, methyl, methoxy, nitro, fluoro, chloro, or bromine; and R is phenyl, phenyl-substituted in the pposition by fluoro, chloro, bromo, methyl, methoxy or nitro, or straight or branched chain alkyl of 1 to 5 carbon atoms -COOR 2. The compound according to claim 40 which is diphenyl-imidazolyl-acetic acid methyl ester.

3. The compound according to claim 37 diphenyl-imidazolyl-acetic acid.

4. The compound according to claim 40 diphenyl-imidazolyl-acetic acid ethyl ester.

5. The compound according to claim 40 diphenyl-imidazolyl-acetic acid n-propyl ester.

6. The compound according to claim 40 diphenyl-imidazolyl-acetic acid isobutyl ester.

7. The compound according to claim 40 diphenyl-imidazolyl-acetic acid n-octyl ester.

8. The compound according to claim 40 diphenyl-imidazolyl-acetic acid n-decyl ester.

9. The compound according to claim 40 diphenyl-imidazolyl-acetic acid benzyl ester.

10. The compound according to claim 38 diphenyl-imidazolyl-acetic acid nitrile.

11. The compound according to claim 40 which is phenyl-4-methylphenyl-imidazolyl-acetic acid methyl ester.

12. The compound according to claim 40 which is phenyl-2-methylphenyl-imidazolyl-acetic acid methyl ester.

13. The compound according to claim 40 which is fl-irnidazolyl-flfi-diphenyl propionic acid ethyl ester.

14. The compound according to claim 37 which is dighenyl-imidazolyl-acetic acid methyl ester hydrochlon e.

15. The compound according to claim 40 which is phenyl-4-chlorophenyl-imidazolyl-acetic acid ethyl ester.

16. The compound according to claim 40 which is phenyl-4-chlorophenyl-imidazolyl-acetic acid methyl ester.

17. The compound according to claim 40 which is phenyl-Z-chlorophenyl-imidazolyl-acetic acid methyl ester.

18. The compound according to claim 40 which is phenyl-isopropyl-imidazolyl-acetic acid ethyl ester.

19. The compound according to claim 41 which is which is which which which which which is which is which is v diphenyl-imidazolyl-acetic acid amide.

20. The compound according to claim 41 which is diphenyl-imidazolyl-acetic acid methylamide.

21. The compound according to claim 41 which is diphenyl-imidazolyl-acetic acid dimethylamide.

22. The compound according to claim 40 which is bis-(4-chloropheny1)-imidazolyl-acetic acid methyl ester.

23. The compound according to claim 40 which is bis-(4-tolyl)-imidazolyl-acetic acid methyl ester.

24. The compound according to claim 40 which is bis-(4-bromophenyl)-imidazolyl-acetic acid methyl ester.

25. The compound according to claim 40 which is bis-(4-fluorophenyl)-imidazolyl-acetic acid methyl ester or the hydrochloride salt thereof.

26. The compound according to claim 40 which is bis-(4 methoxyphenyl) imidazolyl-acetic acid methyl ester.

27. The compound according to claim 37 which is bis-(4- nitro-phenyl) -imidazolyl-acetic acid ethyl ester hydrochloride.

28. The compound according to claim 40 which is fi-phenyl-B-isopropyl 13 imidazolyl propionic acid ethyl ester.

29. The compound according to claim 40 which is ,S-phenyl-fl-isopentyl B imidazolyl propionic acid ethyl ester.

30. The compound according to claim 40 which is diphenyl-Z-methyl-imidazolyl-acetic acid methyl ester.

31. The compound according to claim 40 which is phenyl-tert.-butyl-imidazolyl-acetic acid methyl ester.

32. The compound according to claim 37 which is diphenyl-imidazolyl-acetic acid methyl ester-tartrate.

33. The compound according to claim 40 which is diphenyl-imidazolyl-acetic acid methyl ester-succinate.

34. The compound according to claim 40 which is diphenyl-imidazolyl-acetic acid methyl ester sulphate.

35. The compound according to claim 40 which is diphenyl-imidazolyl-acetic acid methyl ester-methanesulphonate.

36. The compound according to claim 37 which is diphenyl-imidazolyl-acetic acid methyl ester-naphthalene- 1,5-disulphonate.

37. A compound selected from the group consisting of a phenyl-imidazolyl-carboxylic acid derivative of the formula:

U R4 If i(om)m-x wherein R is hydrogen, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, alkylmercapto of 1 to 4 carbon atoms, chloro, fluoro, bromo or nitro;

R is alkyl of 1 to 8 carbon atoms, phenyl or phenyl substituted by alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, alkylmercapto of 1 to 4 carbon atoms, chloro, fluoro, bromo or nitro;

X is cyano, carboxy, carbalkoxy in which alkoxy has from 1 to 12 carbon atoms, carbobenzyloxy, carbamyl, N- alkyl carbamyl in which alkyl has 1 to 4 carbon atoms, or N, N-di(alkyl)carba myl in which each alkyl group has 1 to 4 carbon atoms; and

m has a value of 0 or 1; and

the pharmaceutically acceptable nontoxic salts thereof.

38. A compound according to claim 37 wherein X is cyano.

39. A compound according to claim 37 wherein X is carboxy.

40. A compound according to claim 37 wherein X is carbalkoxy or carbobenzyloxy.

41. A compound according to claim 37 wherein X is carbamyl, N-alkyl carbamyl, or N,N-di(a1kyl)carbamy1.

References Cited UNITED STATES PATENTS 2,411,662 11/1946 Martin et a1. 260-558 A 3,190,917 6/1965 Johnson et a1. 260-558 A 3,592,805 7/1971 SZabO et a1 260309 OTHER REFERENCES Klinger, H.: Chemical Abstracts, vol. 6, pp. 2081-82 (1912).

ALEX MAZEL, Primary Examiner J. TOVAR, Assistant Examiner US. Cl. X.R.

UNZTED STATES PATENT oFncE CERTIFICATE @F QGRRECTWN Patent No. 9 9 242 D d May 8, 1973 lnventmks) Karl Heinz Buchel ei: .211,

It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

38. The compound according to claim 1. which is diphenyl imidazolyl-acetic acid methyl ester succiimteo 39a The compound according to claim I which is diphenyl-imidaeolyl acetic acid methyl ester sulphateo 40 The compound according to claim 1 which is Al The compound according to claim 1 which is diphenyl-imidaz0ly].-acetic acid methyl ester naphthalene 1,5-disulph0na te.

Signed and sealed this 12th day of February 1974 (SEAL) Attest:

EDWARD M.FLETCHER,JR.

0 MA Attesting Officer RSHALL DANN Commissioner of Patents "ORM FO-TOSO (10-69 USCOMM-DC 5"3376-P69 UNITED STATES PATENT oFFicE (IERTlFlCXlE 0F CURHECTIQN Patent NC. 3,732,242 Dated May a, 1973 InvEnmz-(s) Karl Heinz Buchel et al,

It is certified that error appears in the aboveidentified patent and that said Letters Patent are hereby corrected as shown below:

Column 1, lines 44 through 63 should read:

"wherein R R X, g and I' 1 are as above defined, and Hal is halogen, p i with an optionally alkyl substituted imidazole in the presence of acid-binding base or an excess of imida zole preferably in an inert polar solvent at a temperature of from about 20C. to about 180C or metal or silver salt of an optionally alkyl substi-= tuted imidazole in an inert solvent at a temperature of from about 20C. to about 200C, or reacting a hydroxy compound of the formula:

wherein R R X, p and are as above defined,

with an optionally alk'yl substituted imidazole.

Form PO-iQSO (IO-65) reacting the above halogen derivative with an alkali UNITED STATES PATENT OFFICE CERTIFICATE OF QURRECTION Patent No. 3,732,242 Dated May a, 1973 Inventor-(S) Karl Heinz Buchel et a1.

It is certified that: error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 3, line 37 "ably a hydroxy compound of the fomxula" should read --ably from about 50C. to 120C; or

Column 3, lines 63 through 69, the formula should appear as:

R3-T--N R143 il -R Colman 5, lines 1 and 2 should read:

-.- (36) diphenyl imidazolyl acetic acid methyl ester sulphate FORM PO-IOSO (IO-65 6 16-969 UNITED STATES PATENT OFFICE CERTIFICATE @F fiQBRECIIUN' Pafient No. 3,732,242 Dated May 8 I973 Invent01;(s) Karl" Heinz Buchel et al.

It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below;

Column 6, line 20 "nitride" should read nitrile w Column 9, line 20 "esucinimide" should read M =s'uccinimide In Table II, sixth column (Pen, comune) fifth and sixth entries should read: 100 and 100 In Table III. second column (Trichophyton mentagrophytes,

with serum) second entry should read:

In Table III, eighth colmnn (Aspergillus niger with serum) second entry should read: V-- 4 0 roma Po-wso uo-ss;

USCOHM-EC 63376-P6Q UNITED STATES PATENT OFFi CE CERTIFICATE @F CQRRECTMN Patent No, 3,732 Dated May 8,

lnvemofls) Karl Heinz Buchel et a1.

It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 14, line -25, through column 16,, line 23, the claims should appear:

1. A compound selected from the group. consisting of a phenylimidazolyl==carboxylic acid derivative of the formula:

R4 fi i ym wherein R is hydtogen, alkyl of i to A carbon atoms alkoxy of l to 4 carbon atoms, alkylmercapto of l to 4 carbon atoms, chloro, fluoro, bromo or nitro; R is alkyl of 1 to 8 carbon atoms phenyl or phenyl substituted by alkyl of l to 4 carbon atoms, alkoxy of l to 4 carbon atoms, alkylmercapto of 1 to 4 carbon atoms, chloro, fluoro bromo or nitto;

X is cyano, carboxy, carbalkoxy in which alkozty has from I to 12 carbon atoms carbobenzyloxy, carbamyl,

UNITED STATES PATENT omct @ERTIFICATE Oi QQRREMWN 3,732,242 May 8, 1973 Patent No. Dated Karl Heinz Buchel et al Inventor(s) It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

N- alkyl" carbamyl in which alkyi has i to 4 carbon atoms, or N,N-di(a11cyl)carbamyi in which each alkyl group has 1 to icarbon atoms; and

m has a value of 0 or 1; and

the pharmaceutically acceptable nontoxic salts thereof 2 A compound according to claim 1 wherein X is cyano 3 ,A compound according to claim 1 wherein X is carboxy,

4 A compound according to claim 1 wherein X is carbalkoxy I or carbobenzyloxy 5., A compound according to claim 1 wherein X is carbamyl, N-a1kyl carbamyh or N N =di(a1ky1)carbamyl,

6., A compound according toclaim 1 wherein R is hydrogen, methyl, methoxy, nitro fi'uoro, chloro or bromine;

and R is phenyl, phenyl substituted in the p-positi0n by fluoro, chloro, bromo, methyl, methoiw or nitr'o or straight or branched chain alkyl of 1 to 5 carbon atoms.

USCOMWBDC BOSTO-PGQ UMTED STATES PATENT oTTTcE CERTIFICATE @F @URREUHQN Patent No. 3 242 Dated y 8 9 3-973 I Karl Heinz Buchel et a1. Inventofls) I It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown, below:

7., The compound according to claim 4 which is diphenyl==imidazolyi acetic acid methyl ester 8, The compound according to claim 1 which is di'phenyl-imidazoly1-actic acid 9. The compound according to claim awhich is diphenyl imidasolyi acetic acid ethyl ester,,

10 I The compound according. to claim 4 which is diphenylimidazolyl-acetic acid n prohyi estero l1. The compound according to claim which is diphenyl -imidazolyl acetic acid isobuty i ester.

12, T The compound according to claim 4 which is diphenyl-imidazolyl acetic acid n octyl ester,

13. The compound according to claim 4 which is diphenyl -imida zolyl=-acetic acid n decy'i ester.

14. The compound according to claim 4 which is diphenyl -imidazolyl acetic acid benzyl estera FORM PO-IOSO (IO-69) uscg gc 5;)376-969 q UNITED STATES PATENT OFFICE v CERTIFICATE 0F CURREC'HQN Patent No. 397329242 D t d M819 8 1973 Inventor(s) Karl nz Buchel et a It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

' 15. The compound according to c laizn 2 which is diphenyl imidazolyl-acetic acid nitrile 16., The compound according to claim Q which is phenyl-4-m'ethylphenyl-imidazolyl aceEic acid methyl ester,

17., The compound according to claim 4 which is phenyl-2-methy1phenyl-imidazolyl acetic acid methyl ester.

18, The compound according to claim which is B-imidazolyl-B,B-diphenyl propionic acid ethyl estera 19 The compound according to claim 1 which is diphenyl-imidazolyl-=acetic acid-methyl ester hydrochloride.

20. The compound according to claim a which is pheny1-4==chlor0pheny1-imidazolyl acetic acid ethyl ester 21 The compound according to claim 4- Which is pheny1=-4-chlor0pheny1-imidazolyl-acetic acid methyl ester.

22., The compound according to claim 4 which is phenyl-Z chlorophenyl -imidazolyl acetic acid methyl ester,

U$COMM-DC 60376-4 53 UNITED STATES PATENT oTTTcE @ERTIFICATE @F QORRECHQN Patent No. 317329242 May 8, 1973 Dated Inv n ofl Karl Heinz Buchel et eic It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

23. The compound according to claim 4 which is phenyl isopropyl-imidazolyl-acetic acid ethyl ester.

24.. The compound according to claim 5 which is diphenyl- -imidezoHl-acetic acid amidea 25 The compound according to claim 5 which is diphenylimidazolyl acetic acid methylamideo 26. The compound according to claim 5 which is diphenyl-imidazolyl-acetic acid dimethylamide,

27. The compound according to claim & which is his-( wchlorophenyl)-imidazolyl-=acetic,, acid methyl ester.

28. The compound according to claim 4 which is v his(4=tolyl)-imidazolyl-ecetic acid methyl ester" The compound according to claim a which is bis-(4-bromophenyl)-imidazolyl-acetic acid methyl ester,

30. Y The compound according "to claim 4 I which is bis-( -fluorophenyl)-imidazo1yl-acetic acidmethyl ester or the hydrochloride salt thereof,

lDHTED STATES PATENTQFFHHZ @ERTlPlQi-TE @F CQRRECTTUN Patent No. 3 9 3 w 242 Dated May 8, 3.973

cgg Karl Heinz Buchel et al,

It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

31 The compound according to claim d which is bis-(4=methoxy-phenyl)-imidazolyl-ecetic acid methyl ester.

32, The compound according to claim 1 which is bis-(h-nitro=phenyl)-imidazolyl acetic acid ethyl ester hydrochloride,

33; The compound according to claim 4 which is B-phenyl-B-is0propyl-fi-imidazolyl propionic acid ethyl ester.

34; The compound according to claim 4 which is 35 The compound according to claim 4 -which is diphenyl=2methyl-imidazolyl-acetic acid rr zethyl estero 36 The compound according to claim 4 which is phenyl-tert.-bhtl-imidaz0lyl-acetic acid methyl ester,

37 The compound accordiqg to claim 1. which is diphenyl-imidazolyl-acetic acid methfl estet tartrate.

F PO-GSO USCOMM-DC 60378-96? 

